Back extrinsec muscles:

Question 1

trapezius - transverse part

Answer 1

O: aponeurosis of T1-T4 spinous processes
I: Acromion of scapula
I: Accessory n. (XI) and cervical plexus C3-C4
A: draws scapul medially

Question 2

Trapezius - ascending part

Answer 2

O: spinous process of T5-T12
I: spine of scapula
I: Accessory n. ( CN XI) and cervical plexus C3-C4
A: draws scapula medially downward
Entire muscle steadies scapula on thorax

Question 3

Levator scapulae m.

Answer 3

O: Transverse process of C1-C4
I: superior angle of scapula
I: Dorsal scapular n. (C4-C5)
A: draws scapula medially upwards, while moving inf. angle medially
incline neck to same side

Question 4

Rhomboid minor m.

Answer 4

O: Spinous process of C7-T1
I: medial border of scapula above scapular spine
I: dorsal scapular n C4-C5
A: steadies scapula, draws scapula medially upward

Question 5

Rhomboid Major m.

Answer 5

O: spinous process T1-T4
I: medial border of scapulae, below scapular spine
I: dorsal scapular n. (C4-C5)
A: steadies scapula, draws scapula medially upward

Question 6

Latissimus dorsi m. - vertebral part

Answer 6

O: SP T7-T12 and thoracolumbar fascia
I: Floor of intertubercular groove of humerus
I: Thoracodorsal n ( C 6-C8)
A: internal rotation, adduction, extension, respiration “ cough muscle”

Question 7

Latissimus dorsi -scapular part

Answer 7

O: inferior angle of scapula
I: floor of intertubercular groove of humerus
I: thoracodorsal n C6-C8
A: internal rotation, adduction, extension, respiration “ cough muscle”

Question 8

Latissimus dorsi - costal part

Answer 8

O: 9-12 ribs
I: floor of the intertubercular groove of humerus
I: thoracodorsal n C6-C8
A: internal rotation, adduction, extension, respiration, “cough muscle”

Question 9

latissimus dorsi -iliac part

Answer 9

O: posterior one third of iliac crest
I: floor of intertubercular groove of humerus
I: thoracodorsal nerve C6-C8
A: internal rotation,adduction, extension, respiration, “ cough muscle”

Question 10

Trapezius - descending part

Answer 10

O: Occipital bone, spinous process of C1-C7
I: lateral one third of clavicle
I: accesory n. ( CN XI) and cervical plexus C3-C4
A:Draws scapula obliqueli upward, rotates glenoid cavity superiorly
Tilts head same side and rotate it to opposite